Add wkdev-setup-default-clang script

This allows easily installing and switching between different clang toolchains

images/wkdev_sdk/Containerfile

@@ -127,10 +127,12 @@ COPY /rootfs/usr/bin/podman-host /usr/bin/podman-host
 
 COPY /rootfs/etc/ccache.conf /etc/ccache.conf
 
-# Convenience symlink for clang tools, the VSCode extension doesn't find these by default.
-RUN for command in clang clang++ clangd clang-format clang-tidy lld lldb lldb-server lldb-vscode; do \
-        ln -s "/usr/bin/${command}-18" "/usr/local/bin/${command}"; \
-    done && ln -s "/usr/bin/lld-18" "/usr/local/bin/ld.lld";
+# Convenience symlinks for clang tools, the VSCode extension doesn't find these by default.
+# FIXME: Reduce code duplication with `wkdev-set-default-clang`.
+RUN for binary in /usr/bin/*-18; do \
+        local binary_name="$(basename $binary)" \
+        ln -s "$binary" "/usr/local/bin/${binary_name::-3}" \
+    done
 
 # Fix Qt6 system packages - missing symlinks in the Ubuntu-provided packages.
 RUN export QT_VERSION=$(qmake6 -query QT_VERSION) && \

scripts/container-only/wkdev-setup-default-clang

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+# Copyright 2024 Igalia S.L.
+# SPDX-License: MIT
+
+if [ -f "${WKDEV_SDK}/.wkdev-sdk-root" ]; then
+    source "${WKDEV_SDK}/utilities/application.sh"
+else
+    echo "Please set \${WKDEV_SDK} to point to the root of the wkdev-sdk checkout."
+    exit 1
+fi
+
+init_application "${0}" "Installs and creates symlinks to set default clang executables" container-only
+
+argsparse_use_option "=version:" "The clang version" "mandatory" "type:uint"
+
+
+argsparse_usage_description="$(cat <<EOF
+<< Purpose >>
+
+    Provides an easy way to install and switch between clang toolchains.
+
+<< Examples >>
+
+    $ ${application_name} --version=17
+EOF
+)"
+
+run() {
+
+    argsparse_parse_options "${@}"
+    local version="${program_options["version"]}"
+
+    echo ""
+
+    # Sanity check versions Ubuntu actually has.
+    if (( $version < 14 )) || (( $version > 18)); then
+        echo "$version is not a valid value (between 14-18)."
+        exit 1
+    fi
+
+    if [ ! -f "/usr/bin/clang-$version" ]; then
+        echo "Installing clang toolchain version $version"
+        echo ""
+        if ! sudo apt-get install "clang-tools-$version" "clangd-$version" "clang-format-$version" "clang-tidy-$version" "lld-$version" "lldb-$version"; then
+            echo ""
+            echo "Failed to install clang toolchain"
+            exit 1
+        fi
+    fi
+
+    local output_path
+    if [ "$EUID" -eq 0 ]; then
+        output_path='/usr/local/bin'
+    else
+        output_path="$HOME/.local/bin"
+    fi
+    echo "Creating symlinks in $output_path"
+    for binary in /usr/bin/*-"$version"; do
+        local binary_name="$(basename $binary)"
+        ln --symbolic --force "$binary" "${output_path}/${binary_name::-3}"
+    done
+}
+
+run "${@}"